205541023 has 2 divisors, whose sum is σ = 205541024. Its totient is φ = 205541022.

The previous prime is 205540997. The next prime is 205541027. The reversal of 205541023 is 320145502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205541023 - 2¹⁷ = 205409951 is a prime.

It is a super-2 number, since 2×205541023² = 84494224271773058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205540985 and 205541003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205541027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102770511 + 102770512.

It is an arithmetic number, because the mean of its divisors is an integer number (102770512).

Almost surely, 2^205541023 is an apocalyptic number.

205541023 is a deficient number, since it is larger than the sum of its proper divisors (1).

205541023 is an equidigital number, since it uses as much as digits as its factorization.

205541023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 205541023 is about 14336.7019568658. The cubic root of 205541023 is about 590.1551090799.

Adding to 205541023 its reverse (320145502), we get a palindrome (525686525).

The spelling of 205541023 in words is "two hundred five million, five hundred forty-one thousand, twenty-three".